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Determination of photothermal conversion efficiency of graphene and graphene oxide through an integrating sphere method

  • Datos identificativos

    Identificador: PC:1275
    Handle: https://hdl.handle.net/20.500.11797/PC1275
    Autores:
    J.J. CarvajalOl.A. SavchukJ. MassonsM. AguilóF. Díaz
    Resumen:
    We report a new method for the determination of photothermal conversion efficiency of photothermal agents, based on the use of an integrating sphere. We validated this method by comparing the photothermal conversion efficiency of Au nanorods calculated by this method and by the more conventional time constant method. Then, we applied this method to determine the photothermal conversion efficiency of graphene and graphene oxide nanosheets dispersions in dimethylformamide and water, respectively, finding out that they are excellent photothermal agents with photothermal conversion efficiencies among the highest reported up to now. We also analyzed the influence of the concentration of the materials, and the wavelength and power of irradiation in the temperature increase that can be achieved with them, finding out that they can be used, for instance, in cancer treatment through hyperthermia procedures with reduced costs when compared to other photothermal agents.

  • Otros:

    Autor según el artículo: J.J. Carvajal; Ol.A. Savchuk; J. Massons; M. Aguiló; F. Díaz
    Departamento: Química Física i Inorgànica
    Autor/es de la URV: CARVAJAL MARTÍ, JOAN JOSEP; Ol.A. Savchuk; J. Massons; AGUILÓ DÍAZ, MAGDALENA; DÍAZ GONZÁLEZ, FRANCISCO MANUEL
    Palabras clave: oxide graphene photothermal
    Resumen: We report a new method for the determination of photothermal conversion efficiency of photothermal agents, based on the use of an integrating sphere. We validated this method by comparing the photothermal conversion efficiency of Au nanorods calculated by this method and by the more conventional time constant method. Then, we applied this method to determine the photothermal conversion efficiency of graphene and graphene oxide nanosheets dispersions in dimethylformamide and water, respectively, finding out that they are excellent photothermal agents with photothermal conversion efficiencies among the highest reported up to now. We also analyzed the influence of the concentration of the materials, and the wavelength and power of irradiation in the temperature increase that can be achieved with them, finding out that they can be used, for instance, in cancer treatment through hyperthermia procedures with reduced costs when compared to other photothermal agents.
    Grupo de investigación: Física i Cristal·lografia de Nanomaterials Física i Cristal.lografia de Materials
    Áreas temáticas: Chemistry Química Química
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 0008-6223
    Identificador del autor: 0000-0002-4389-7298; n/a; n/a; 0000-0001-6130-9579; 0000-0003-4581-4967
    Fecha de alta del registro: 2016-03-16
    Página final: 141
    Volumen de revista: 103
    Versión del articulo depositado: info:eu-repo/semantics/submittedVersion
    Enlace a la fuente original: https://www.sciencedirect.com/science/article/abs/pii/S0008622316301683?via%3Dihub
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI del artículo: 10.1016/j.carbon.2016.02.075
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2016
    Página inicial: 134
    Tipo de publicación: Article Artículo Article

  • Palabras clave:

    Grafè
    oxide
    graphene
    photothermal
    Chemistry
    Química
    Química
    0008-6223

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